分析oracle不走索引

 BEGIN
      DBMS_STATS.GATHER_TABLE_STATS(ownname => 'gis',
                                    tabname => 'VROAD_groad_grid_zb',    ----这是表名
                                    estimate_percent => 100,
                                    no_invalidate => FALSE,--立马生效
                                    degree => 8,
                                    cascade => TRUE);
    END;